10 Facts about Lower Mantle

Look at the interesting information about the inner part of earth mantle on Facts about Lower Mantle. Mantle occupies the area between the outer core and crust. The average thickness of earth’s mantle is measured at 1,793 miles or 2,886 km. Around 84 percent of the volume in our planet is occupied by mantle. It may occur in the form of viscous fluid in a certain geological period. However, in most cases, it appears in solid form.

Facts about Lower Mantle 1: the hot core

The hot core is enclosed by the mantle. Around 15 percent of volume of earth is occupied by the hot core, which contains high level of nickel and iron.

Facts about Lower Mantle 2: the structure and composition

The direct geoscientific analyses and geophysical investigation are the two major sources of information used to define the composition and structure of lower mantle.

Facts about Lower Mantle

Facts about Lower Mantle 3: the division of earth’s mantle

The earth mantle is divided in a number of sections because of the seismology. The upper mantle lies from 4.3 to 21.7 miles to 250 miles downward. The transition zone is located between 410 to 660 kilometers or 250 to 410 miles.

Facts about Lower Mantle 4: the location of the lower mantle

The location of the lower mantle is around 660 to 2,891 kilometers or 410 to 1,796 miles.

Facts about Lower Mantle 6: the information about the lower mantle

Facts about Lower Mantle 7: mantle and core

The earth core is enclosed by the mantle. Both are separated by the presence of D layer.

Facts about Lower Mantle 8: discontinuous zones

Discontinuous zones are housed inside the lower mantel. Another term to call it is thermo chemical piles which carries the warm materials to the earth surface. It may have different chemical or thermal features.

Facts about Lower Mantle

Facts about Lower Mantle 9: plate tectonics

The radioactive decay of potassium, thorium and uranium found on the mantle and crust of earth may drive the plate technique for the decay is the main heat source.